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Latex and preparation method thereof

Inactive Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the low solid content of the latex obtained by the existing method and provide a method for preparing latex that can increase the solid content and the latex prepared by the method

Method used

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  • Latex and preparation method thereof
  • Latex and preparation method thereof

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preparation example Construction

[0018] The preparation method of the latex provided by the present invention includes mixing and emulsifying the glue, the main emulsifier, the co-emulsifier, the pH regulator and water and removing the organic solvent, and then mixing the product after removing the organic solvent with the creaming agent contact and remove part of the water; the glue is an organic solution containing a polymer, the main emulsifier is fatty acid, and the co-emulsifier is fatty acid salt.

[0019] According to the present invention, although the latex with higher solid content can be obtained as long as the above method is followed, in order to avoid significant changes in the pH value in the system and to make the obtained latex more stable, preferably, the preparation method of the latex It also includes mixing and emulsifying the pH buffer and the colloidal protective agent together with the glue, the main emulsifier, the auxiliary emulsifier, the pH regulator and water.

[0020] According t...

Embodiment 1

[0034] This embodiment is used for illustrating latex provided by the invention and preparation method thereof.

[0035] according to figure 1 Shown process carries out the preparation of latex, concrete steps are as follows:

[0036] Add 1000 parts by weight of polyisoprene with a concentration of 10% by weight (Beijing Linshi Refined Chemical New Material Co., Ltd., with a weight average molecular weight of 400,000) in cyclohexane glue into crude latex preparation tank 1, and at 20°C, At a stirring rate of 60r / min, 4 parts by weight of oleic acid were added and mixed uniformly to obtain a mixed product; , 1.2 parts by weight concentration of potassium dihydrogen phosphate aqueous solution of 5% by weight, 3 parts by weight of polyvinyl alcohol aqueous solution with a concentration of 2% by weight (wherein, polyvinyl alcohol was purchased from Guangzhou Qisheng Chemical Co., Ltd., the brand is BP-24 , the same below) and 600 parts by weight of water were added to the above ...

Embodiment 2

[0038] This embodiment is used for illustrating latex provided by the invention and preparation method thereof.

[0039] according to figure 1 Shown process carries out the preparation of latex, concrete steps are as follows:

[0040] Add 1,000 parts by weight of butadiene rubber (purchased from Shanghai Duokang Industrial Development Co., Ltd., brand BR9000) cyclohexane glue solution with a concentration of 10% by weight into the crude latex preparation tank 1, at 40°C, at 100r / min Add 2 parts by weight of oleic acid and mix evenly at a stirring rate of 200 r / min to obtain a mixed product; then, at 40 ° C and a stirring rate of 200 r / min, 10 parts by weight of a sodium oleate aqueous solution with a concentration of 5 wt %, 3 parts by weight A concentration of 5% by weight potassium dihydrogen phosphate aqueous solution, 10 parts by weight of a 20% by weight polyvinyl alcohol aqueous solution and 600 parts by weight of water are added to the above-mentioned mixed product, an...

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Abstract

The invention discloses a preparation method of latex and the latex obtained according to the preparation method. The preparation method comprises the following steps: carrying out mixed emulsification on a glue solution, a main emulsifier, a co-emulsifier, a pH regulator and water, removing an organic solvent, and enabling the product obtained after the removing of the organic solvent to be in contact with a creaming agent and removing part of water, wherein the glue solution is an organic solution containing a polymer, the main emulsifier adopts fatty acid, and the co-emulsifier adopts a fatty acid salt. Through the adoption of the preparation method, the latex with relatively high solid content can be obtained.

Description

technical field [0001] The present invention relates to a preparation method of latex and the latex obtained by the preparation method. Background technique [0002] Synthetic latex is an important class of polymer materials and plays an important role in the synthetic rubber industry. In developed countries, its output generally accounts for 15-20% of the total synthetic rubber output. At present, synthetic latex has been widely used in paper processing, fiber processing, plastic synthesis, coatings, adhesives, building materials and other fields. With the development of science and technology, its application field is still expanding, and its demand is increasing day by day, but at the same time, it also puts forward new requirements for the improvement of the performance and multifunctionality of synthetic latex. [0003] At present, the preparation of polyisoprene latex, low cis-polybutadiene latex, and butadiene rubber latex is usually based on the monomer, and underg...

Claims

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Application Information

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IPC IPC(8): C08J3/07C08L9/10C08L9/08C08L23/16
Inventor 杜昕张杰于国柱李传清徐林解希铭段海东苗玉红刘冬梅张宇婷
Owner CHINA PETROLEUM & CHEM CORP
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